Housing comprising a housing underpart and method for emitting electromagnetic radiation

Abstract

A housing includes a housing underpart, the housing underpart being provided with a housing cavity. The housing cavity comprises an opening on one housing side and, on the floor of the cavity, contains an electromagnetic radiation emitting semiconductor chip. A cover that is at least partially transparent to the electromagnetic radiation covers the housing cavity. A method for emitting electromagnetic radiation in a preferred direction is also disclosed.

What is claimed is: 
     
       1. A housing comprising:
 a housing underpart; 
 a housing cavity defined within the housing underpart; the housing cavity having an opening extending through one side of the housing; 
 at least one electromagnetic radiation emitting semiconductor chip disposed in the housing cavity; and 
 a transparent cover that covers the housing cavity, the cover connected to the housing underpart in such a way that the electromagnetic radiation exiting from the side surfaces of the cover is absorbed 
 wherein the at least one electromagnetic radiation-emitting semiconductor chip is mounted in the housing cavity by means of an adhesive material and a gap is present between the at least one electromagnetic radiation-emitting semiconductor chip and the transparent cover. 
 
     
     
       2. The housing as in  claim 1 , wherein the housing comprises an absorptive material placed in such a way that the absorptive material absorbs the radiation emitted from the side surface of the cover. 
     
     
       3. The housing as in  claim 2 , wherein the housing underpart comprises at least one housing base and one housing frame, and the housing frame contains a frame recess in which the cover is disposed, the cover connected to the housing frame by an absorptive adhesive. 
     
     
       4. The housing as in  claim 3 , wherein the absorptive material is disposed between the side surface of the cover and the housing frame. 
     
     
       5. The housing as in  claim 3 , wherein the height of the cover is equal to or less than the height of the frame recess. 
     
     
       6. The housing as in  claim 3 , wherein an edge region of a top side of the cover opposite to the housing cavity is coated with an absorptive layer. 
     
     
       7. The housing as in  claim 3 , wherein the side surfaces of the cover are coated with an absorptive layer. 
     
     
       8. The housing as in  claim 3 , wherein material of the housing frame comprises aluminum oxide and material of the housing base comprises aluminum nitride. 
     
     
       9. The housing as in  claim 1 , wherein the housing underpart comprises at least one housing base and one housing frame and the housing frame contains a frame recess in which the cover is disposed, the absorptive material being disposed between the side surface of the cover and the housing frame and the absorptive material being an adhesive that produces a mechanical connection between the cover and the housing underpart. 
     
     
       10. The housing as in  claim 1 , wherein the cover is optically coupled to the housing underpart. 
     
     
       11. The housing as in  claim 1 , wherein the cover material is a glass or a cured silicone and is thermally resistant to the radiation from the semiconductor chip. 
     
     
       12. The housing as in  claim 3 , wherein the material of the housing frame and of the housing base is a ceramic or a synthetic material that is thermally resistant to the radiation from the semiconductor chip. 
     
     
       13. The housing as in  claim 1 , wherein material of the housing underpart comprises aluminum nitride. 
     
     
       14. The housing as in  claim 1 , wherein the side surfaces of the cover are ground at an angle such that the radiation coupled into the cover is deflected into the housing underpart. 
     
     
       15. The housing as in  claim 14 , wherein the side surfaces of the cover are coated with an absorptive layer. 
     
     
       16. The housing as in  claim 1 , wherein the side surfaces of the cover are ground at an angle such that the radiation coupled into the cover is deflected into the body. 
     
     
       17. A housing comprising:
 a housing underpart defining a single housing cavity within the housing underpart, the single housing cavity having an opening extending through one side of the housing; 
 a plurality of electromagnetic radiation-emitting semiconductor chips disposed in the housing cavity ; and 
 a transparent cover that covers the housing cavity, the cover being connected to the housing underpart in such a way that the electromagnetic radiation exiting from a side surface of the cover is absorbed 
 wherein the at least one electromagnetic radiation-emitting semiconductor chip is mounted in the housing cavity by means of an adhesive material and a gap is present between the at least one electromagnetic radiation-emitting semiconductor chip and the transparent cover.